I've been told my whole life, that EVERY single person has a reason he's living, and i mean with that, that if you kill yourself, like because of your karma you reincarnate again and you still will have to "finish your job" but it can happen that you'll be born very poor or sick or it'll be a harder life...i just heard that a friend of my moms got cancer..this is so horrible...but it has some reason she got it, like destiny, maybe she did sumthin wrong in her past life.
try to find the reason you're so depressed and do something but DON'T KILL YOUSELF!! that's not the solution!
even if you think you're alone WE ARE THERE FOR YOU!! *hugs*